Adjustable supporting bracket



J. B. M MULLEN ADJUSTABLE SUPPORTING BRACKET Apr. 17, 1923.

2 Sheets-Sheet 1 Filed May 14, 1921 awwwlaz Y JUSEPH EMcMuLLsN W Wad-In Apr. 17, 1923. 1,451,881

J. B. MCMULLEN ADJUSTABLE SUPPORTING BRACKET Filed May 14. 1921 2 Sheets-Sheet 2 Patented Apr, 117, li'lfi JOSEPH B. TEGMULLEN, OF GATUNSVILLE, MARYLAND.

ADJUSTABLE SUPPORTING BRACKET.

Application filed May 14, 1921, Serial No. 469,737.

To all whom it may concern: Be it known that l, Josnrrr B. McMULLnN,

a citizen of the United States, residing in the town oi Catonsvill'e, county oi Baltia more, State of Maryland, have invented certain new and useful improvements in Ad justable Supporting Brackets, of which the i:'ollowing is a specification, reference being had to the accompanying drawings, illuslo trative of one particular embodimentoi my invention.

This invention relates particularly to brackets adapted to firmly support one article from another and permit adjustment of the relative positions of the two members intermediate which the bracket forms the connecting member, In particular the bracket serves the purpose of clamping an arm rigidly to a rod, bar or like member, and simultaneously with the clamping permits the realtive position of the arm to take a different angularity or position which, when set, is firmly locked in such optional posi tion. lit also provides for the relative adjustment at the other end of an arm in order to maintain parallelism between the end or articulated extension, and the base or the clamp /Vhile brackets containing my invention serve for use in pairs, they may be individually used and provide the combination of characteristics of adjustability,

strength and rigidity, coupled with the many advantages of economy and practicability of manufacture and assurance against wear and deterioration while maintaining required strength for every particular use.

In particular, the adjustable bracket, as shown in the accompanying drawings, comprises an arm with an angular extension to which is added a clamp in rotary relation for adjustment, and having means whereby the locking of the arm locks the clamp, or vice versa, and provides a substantially uni- :form adjustment by the relation of par permitting extension oi the clamp to encompass a variety oi sizes and shapes of a supporting stanchion, bar or staff, or like member. The other member of the bracket has hinged thereto a plate aria-l ned to support the end of a rod, and being adjustable at the hinge or pivot about one axis assures the desired parallelism of the face 01 the hinged plate with re spect to the member supported by it with due regard to the relative position of the rod, stanchion or other member to which the opposite end of the bracket arm is rigidly clamped. i

Particular embodimentsot my invention are shown in the accompanying drawings, in which: i

Figure 1 is a perspective of the adjustable braclret with a shifted position of arm shown dotted to illustrate the articulation and a djustability. I I

Figure 2 is a plan view.

Figure 3 is a front elevation.

Figure 4: is a side elevation.

Figure 5 is a front elevation on a smaller scale with modifications in detail of construction. i

The adjustable supporting bracket as illustrated comprises the bracket arm A to which is hinged at one end the supporting plate B and at the other end the clamping j aws C, Q. As in the preferred form of my invention, the object is to maintain the sup porting plate with its face parallel to a plane including the axis of adjustment of the other end of the arm A and parallel with the axis of the jaws, the supporting plate B therefore carried byhinge D with the pintle (Z carried in a hole on a boss (2' so that the hinge axis is permanently in fixed relation, and in the form shown is parallel with the axis of the stud E forming the opposite end of the arm. The stud or the supporting end E has the taper portion E, merging into the shank F, which is threaded to receive clamp C, while a complementary hole 0 in jaw member C is tapered to provide a locking fit on the tapered p rtion E of the stud end of the arm.

A set screw Gr screws into a threaded hole a on the end of the jaw C on the opposite side oi? the shank from the clamp jaw, and engages a recess 0 in order to permit setting oi the jaw members a suitable distance apart to accommodate the size and shape oi the rod, bar or stanchion I to which it is desired to clamp the adjustable bracket, the clamping jaws being so arranged that they will not project beyond the bar Z, to interi'ere with adjacent members such as the frame section, fragmentary section of which is shown at H. By the clamping of the jaws to the supporting bar or other rigid member Z, the stud E may be swung on its axis, varying the position of adjustment of the arm A to any degree and with any nicety of adjustment desired, which is accommodated by the taper E and when adjusted the hinge D assures the supporting plate B to be swung so that it is in a plane parallel both with the axis of the jaws and the axis of the stud E, in order that this plate B will abut and accurately register with the end of an objectsuch as III, theend of which has a predetermined position to which this supporting plate B must conform and which it must accurately. engage.

The supporting plate B is preferably toothed or knurled with star radial grooves so that it will firmly clamp and hold the abutting plate as by a wing nut H engaging a suitable threaded portion h in the supported memberu The clamps 5 have their jaws preferably-recessed as shown at J so-that the ends assurethe clamoing byspanning to the maximum extent or the jaws a section'of the supporting rod thereby assuring firmness in spite of wear or irregularities.

It will be noted that the nut K when screwed onto the'threaded shank l presses the clamp member C toward the clamp member C, and with the arm A adjusted to the desired angularity' the further pressure of the nut-K will draw the taper section E into a friction locking fit and simultaneously will draw the jawsof the clampsC, G together, so that the single tightening operation of the nut-"K clamps the entire adjustable bracket'to its firm and fixed support and clamps the armin its desired angular posi tion; The desired latitude of sizes and shapes of the supporting stanchion Z is accommodated by the set screw G, which engaging-therecess 0 assists in keeping the two partsof the clamp in the proper relative position.

As shown in Figure 3, an additional arm L may be" positioned with a frictional or serrated boss or hub engaging the complementary face on'theside ofthe clamp member C, so that an additional clamping operaation is simultaneously performed by turning the nut ll; home or to its seat, viz, effecting a rigid support in the desired angular position of the arm L at the end of which member L'may' be a mirror M or such other device as may be desired As shown in Figure 5, the tapered stud section E is supplanted by the engaging serrated disc portions N, one side being on the boss or hub E" of the arm A and the other on the back of the clamping plate C". The threadedshank in this modification takes the term of a bolt with the head 0,

same function as when drawing home the tapered shank E in the preferred form. In either case, while a full bearing is provided for the nut l: on the back of the clamp C, the hole (a), in the clamp C, is larger than the threaded or other portion ofthe shank which it surrounds, in order to provide for canting and irregularities in adjustment, and insure alirm bearing of the clamps with the main stanchion of the section in co-operation wit-h the heel set'screw G on their opposite end. It will thus be seen that, for example, when my improved supporting bracket is used on a motor car it serves in a most efficient, durable and efl'ectivemanner to rigidly support the ends of a visor or similar article, the end portionof which is shown at HI. In such case the visor roll or frame may be of uniform length, while the distance between the wind shield stanchions such as indicateo at I on either side of the car may vary in distance of separationandthe adjustability of the brackethinge D will al ways insure a perfectly registeringengage' ment of the plate E with the end of the: visor plate or roller, while the clamping endof the bracket may be raised or lowered,,andwhile attaching to any size-of wind shield, may with one operation ofthe'tighteningof the nut K affect a simultaneous locking: of adjustment and clamping with rigidity and permanence for all conditions of service. By the formation of the jaw sides ofthe clamps, as shown, they are-universally applicable to a round, square or other sectional rod or stanchion. In particular the great advantage of my adjustable bracket when used in this connection is its strength and simplicity and economy of manufacture.

t is evident that many modificationscan be made in the details of construction, in dimensions, and in the material of which my. bracket or its various parts are constructed, without departing from my invention, but what I claim and desire to secure by Letters iPatent is l. A bracket comprisingv an arm-, a member pivotally attached thereto atone end, a bolt cooperating with its other end, and clamps coacting with said bolt to-clampsaid arm to a fixed support and simultaneouslylock said arms to said clamps in any desired position;

2. A bracket comprising, in combination, clamping means having an opening therethrough, an arm having. an opening adjacent an end thereof, said arm adapted totrim tionally engage said device, means passing through said openings to secure said arm in an adjusted positiomand asupporting elemen adjustably mounted on said arm adapted to occupy a plurality of parallel positions, as said arm is adjusted.

3. A bracket comprising, in combination, clamping means having an opening.therethrough, an arm having an opening adj acent an end thereof, said arm adapted to fi icname to this application, in the presence of tionally engage said device, means passing two subscribing Witnesses, this 26th day of through said openings to secure said arm in April, 1921.

an adjusted position, and a supporting ele- JOSEPH B. MCM'ULLEN. 5 ment mounted on said arm on a pivot parai- Witnesses:

lelwith said securing device. HERMAN F. CUNTZ,

In testimony whereof, I have signed my H. Y. MONTAGUE. 

